Grate.



J. H. BROWN.

GRATE.

APPLICATIQN FILED APR. 12, 1917.

Patented t. 1, 1%18.

2 SHEETSSHEET 2.

WITIVE88E8 A TTORI'IIEYS JAMES HUGI-I BROWN, OF BU'ITE, MONTANA.

GRATE.

Specification of Letters Patent.

Patented Oct. 1, 1918.

Application filed April I2, 1917. Seria1 N0. 161,423.

T0 all wkom c't mag c onoern:

Be it known that I, JAMES H. BROVYN, a citizen 0f the United Stabes, and a res1dent cf Butte, in the county of Silverbow ar 1d State of Montana, have invented a certa1n new and useful Improvement in Grates, 01 which the following is a specification.

One 0f the principal objects of my 111- vention is to provide an improved grate 1n which perforated plates are removably supported 011 base framesin such manner as t0 be individually removable f0r renewal 01' repair, the construction being such that there is a free circulation of air through and around the plates.

Another object 0f the invention 1s t0 provide an improved grate of' the dass described, which W111 be extremely simple, du-

rable, efficient in operation, and inexpensive to manufacture.

Vith these and other objects m v1eW Whieh Will become apparent as the descr1ption proceeds, the invention resides in the construction, combination, and arrangerpent cf parts hereinafter more fully descnbed and claimed, am]. illustrated in the accompanying drzwvings in which 1ike characters cf reference indicate like parts throughout the several figufes, 0f which- Figure l represents a top p1an view of a section 0f grate constructed according to my invention;

Fig. 2 represents a side elevational view thereof;

Fig. 3 represents a. view m se ct1on taken 0n the plane indicated by the 1111e 33 cf Fig. l;

Fig. 4 represenfis a view m perspect1ve of one of the plates looking at the under s1de the1eof;

Fig. 5 represents a sectional view tanken y vertically and transversely through a couple 0f forced draft burner pans cf specia1 design, having the base frame an i plates 0011- structed according t0 my invent1on mounted thereon;

Fig. 6 represents an en1arged fragmentary side elevational view 01 the device.

Fig. 7 represents a view simi1ar 130 Fig. 3 showing the arrangement when the flanges project outwardly from the bars.

Referring more particularly to the drewing, I have shown in F1gs. l to 3 1I1C111S1V8, for the purpose 01: conven1ence in 111ustration, base frzunes er grate bars of rectangular shape, including the side bars 5, front end blocks 6, rear end blocks 7, and spaced transverse braces 8 connecting the side bars 5 together intermediate their ends.

Euch 0f the base frames supports a series o1": removable plates thereon. These plates are prefembly rectangular in shape, anal are indicated at 10, being of a Width somewhat greater than the width of the base frames, and each plate is provided With a plurality 01 oblong perforations 1 upwardly through Which -air may readily pass. If found to be desirable, the openings 4 may be 0f some other shape and may be arranged in variou's different ways.

Each cf the plates 10 is provided with oppositely extending pairs 11 und 12 respectively, cf guide lugs. These lugs are a1- ranged inwardly from the lateral edges 0f the p1ates, and the outer ends cf the lugs a1e undercut 01 beveled as at 13 to slidably engage the inwardly projecting beveled flanges 11 formed 011 the upper edges of he lateral bars 5 0f the base frames. Between the lugs 1'0r a suitable distance, the material 0n the under face of each block is cut away 2Ls at 15 t0 leave pads 15 forming an air space between the upper edges 0f the bars 5 and the under faces 0f the blocks es clearly indicated in Fig. 3. The cut away portions 15 are of such Width as 130 extend inwardly 017 the inner edges 0f flanges 14, so that the air may freely pass up over the top edges cf bars 5. At their end edges the plates 10 eure recessed as ab 16, so that when they are in assembled positio1i upon the ba.se frarnes, air openings Will be formed between the abutting ends 0f the plates.

At a suitable distance from their forward ends the opposed bars cf each frame are provided with recesses 17 cut in the flanges 141 whereby t0 admit- 01 the guide lugs, formed 011 the plates, being passed downwardly to a1ine with the flanges 14:, zus Will be understood. In this manner the blocks may be readily engaged 0ne after another up0n the lateral bare 0f the base frames in position to be slid longitudinally of the frames into their desired positions.

By having the blocks thus slidably and detachably engaged upon the base frarnes, it Will be understood that anv certain one 0r more o1 the blocks may be readily removed f0r renevval 0r repair.

The base frarnes are preferably arranged, e indicated in Fig. 1, ab suitable distances apart t0 21110W a space 18 between the adjaccnt edgcs cf the series cf plates, for the circulation of ai1. T0 obtain a uniform space between the gerics cf blocks through- 0ut the grate, the front end blocks 6 cf thc basc frames arc prcferably cxtended shghtly beyond thc lateral edges cf thc framcs, 21 indicated in Fig. l, so that when they ahnt, the proper spacc between the scrics ofblocks Will have becn attained.

The arrangement shown in Fig. 5 is that followed whenthc grae is adapted f01 use in connection With a forced draft burner pan of a particulax type. Here thc 1ower cdgcs cf thc bars 5 of thc base framc zue bcveled as at 19 to fit in the recesscs 20 formcd' in the uppe1 edges of the burner pan Walls.

VVhile the rectangular plates erve t0 couveniently illustratc thc invention, it is to be undeistood that the p1ates Will in actual practice be made in various shapcs und comtourS 110 conform in shape with ahy shape grate bars in connection With Which the invention is t0 be used.

The bevelcd flai1ges 14 formed on uppcr edge of the lateral ba1s 5 of th'c base fmme may larojcct outwardly, as Well as inwar'dly.

As sho'wn in Fig. 7, the bcveled fianges 011 the upper edgcs' 0f the basc fra1he bars may project mitwardly' und in this instance the lugs 011 thc p1atcs Will bc beveled 01 undercut at thcir immer ends as shown So as t0 slidably fit o-n the flanges'.

Although I have described the prcfcrred embodiment cf my invention, I may deshe to make such changcs in the construction, cdmbination, 2Lnd armngem'ent Qf pa1ts thereof, as do 110t depart from thc spirit cf the invention o1 thc scope of the appended claims.

I claimz l. A grate i11cluding a base f1amc 0011- sisting cf spaced walls having flanges at the uppe1 ed9;es the flzlnges hzn7ing cutout portions at onc extremy cf the basc framc, a plurality of plate supported 011 the Walls, lugs formed 011 the botton1 of euch plate, engagcablc with the flangcs t0 hold the platcs in place, the lugs cntcring the cutout portions when thc plateg arc put in place, anal a pad formcd on thc bottom of each plate including' portions adjacent to the lugs extcnding beyond thc nmin pad portion and adapted to 1est 011 the edges of the Walls to spacc the plate from said edges und provided an air passage.

2. A grate including a base frame having spaced side Walls Wih continuous bcvelcd fiungcs disposed longitudinally cf the up per edgias, recesses being cut out cf the flang'cs ncar onc cxtremity 0'f thc base frame, u plurality cf p1ates arranged to be supportcd by the base frame, lugs formed beneath euch plate adaptcd to enter thc recesses und be' slid in p0'sition er1gaging the longitudinal flanges, and p'ads f0r med in thc midle of ca'ch platc be'twecn the lugs and plate, to leave spaces fo1" wir passage when thc said pads resb upon' the side Walls of thc base frame.

3. A grate inch1ding a plurality cf base friunes, (each consistaing of spaced Walls having front end blocks cxtending beyond the sides cf the Walls ending at spaces bet'ween th6 baSe fra1ne and providing' an ai1 passagc, a pluralit} cf plates arranged to be shd ir'1o osition upon each base frame from a place at the front end blocks, holding mc:ms carri ec1 by thc b10cks 'and cngaging the s-ide walls, engaging lugg on thc lateral cdge of each plate pioviding an air passage, und pads 011 thc botcoms of the Islates spacing thc plafies from the top of the Walls '00 provide an air nas'sage.

JAMES HUGH BROWN. Wit1'1eSses: l

CHAS. GREINER,

PHILO O. HANSONL Gop|eu et M111: patent may be obtahied tot flyd. Cents each, by addressing tho Gommissionar o! I'atemz,

Washington, II); G. 

